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path: root/drivers/s390/cio/qdio.h
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Diffstat (limited to 'drivers/s390/cio/qdio.h')
-rw-r--r--drivers/s390/cio/qdio.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index f0037eefd44e..0f4ef8769a3d 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -208,6 +208,7 @@ struct qdio_dev_perf_stat {
unsigned int eqbs_partial;
unsigned int sqbs;
unsigned int sqbs_partial;
+ unsigned int int_discarded;
} ____cacheline_aligned;
struct qdio_queue_perf_stat {
@@ -222,6 +223,10 @@ struct qdio_queue_perf_stat {
unsigned int nr_sbal_total;
};
+enum qdio_queue_irq_states {
+ QDIO_QUEUE_IRQS_DISABLED,
+};
+
struct qdio_input_q {
/* input buffer acknowledgement flag */
int polling;
@@ -231,6 +236,10 @@ struct qdio_input_q {
int ack_count;
/* last time of noticing incoming data */
u64 timestamp;
+ /* upper-layer polling flag */
+ unsigned long queue_irq_state;
+ /* callback to start upper-layer polling */
+ void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
};
struct qdio_output_q {
@@ -399,6 +408,26 @@ static inline int multicast_outbound(struct qdio_q *q)
#define sub_buf(bufnr, dec) \
((bufnr - dec) & QDIO_MAX_BUFFERS_MASK)
+#define queue_irqs_enabled(q) \
+ (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
+#define queue_irqs_disabled(q) \
+ (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
+
+#define TIQDIO_SHARED_IND 63
+
+/* device state change indicators */
+struct indicator_t {
+ u32 ind; /* u32 because of compare-and-swap performance */
+ atomic_t count; /* use count, 0 or 1 for non-shared indicators */
+};
+
+extern struct indicator_t *q_indicators;
+
+static inline int shared_ind(struct qdio_irq *irq_ptr)
+{
+ return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+}
+
/* prototypes for thin interrupt */
void qdio_setup_thinint(struct qdio_irq *irq_ptr);
int qdio_establish_thinint(struct qdio_irq *irq_ptr);